Answer:
Spring constant, K = 415.9 N/m
Explanation:
The period of vibration of a spring, T, is given by:
T = 2√m/K
Where m = mass of the body in kg, K = spring constant or force constant or elastic constant or stiffness in Nm-1
Making K the subject of the expression,
K = m(2)2/(T)2
K = 4m()2/(T)2
Where m = 0.38kg, = 3.14285714286, T = 0.19s
K = 4 x 0.38 (3.14285714286)2 / (0.19)2
K = 4 x 0.38 x 9.87755102043 / 0.0361
K = 15.0138775511 / 0.0361
K = 415.9 Nm-1
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B. To study changes over time
Chronic, low-grade depressed feelings are to "dysthymic" disorder as moderate, recurring mood swings are to "<span>cyclothymic"</span> disorder.
Dysthymic disorder is a genuine condition of interminable discouragement, which holds on for no less than two years (one year for youngsters and youths). Dysthymia is less intense and serious than significant depressive issue.
In cyclothymic disorder, temperaments swing between brief times of mellow wretchedness and hypomania, a raised disposition. The low and high emotional episodes never achieve the seriousness or length of significant depressive or full insanity scenes.
